Length of audio clip

I have a 10 slide Presentation that has timed slide changes. One the first slide I put the entire soundtrack for the whole presentation (music with volume dips for voice over - not something I can do slide for slide) which comes in at close to 6 minutes and just over 4MB.

iSpring Pro seems to cut off the last part of the audio. Is there a limit to how long/large audio files can be?

The issue is that we do not research presentations uploaded to the forum. Please send it to us at support@ispringsolutions.com with the short problem description. We will be glad to sort the problem out.